4.1
(65)
332
riders
56
rides
Mountain bike trails around Éternoz are set within the Jura Mountains, characterized by diverse and dramatic natural landscapes. The region features the Lison Valley with its meandering river and gorges, alongside numerous waterfalls and unique karst formations. Mountain bikers can expect a mix of forest tracks, technical singletracks, and paths traversing varied terrain, including limestone geology and dense woodlands. Elevated viewpoints offer expansive vistas across the valleys.
Last updated: May 9, 2026
3.0
(1)
2
riders
40.2km
03:05
650m
650m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5
riders
22.2km
01:52
370m
370m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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5.0
(1)
6
riders
24.4km
01:52
390m
390m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.0
(2)
4
riders
34.2km
03:11
820m
820m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5
riders
26.0km
02:18
470m
470m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Remember not to venture too far into the cave
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The village of Nans-sous-Sainte-Anne is remarkable for the scale of its landscapes, the rhythm of the mountains and depressions. It knows how to combine in a restricted space the charm of the foliage and the fir trees with the austerity of the rock walls, the impetuosity of the waterfalls with the intimacy of the undergrowth, the mystery of the caves with the picturesqueness of the belvederes.
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The spring is simply gigantic and there aren't too many tourists - at least when we were there.
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This highlight is located on the plateau under which the cave opening is located. It can be found via a dead-end path, but the view is a bit sobering.
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The Sarrasine Cave impresses with its 90 m high portal. A 40 m thick layer of limestone separates it from the upper part of the plateau. The cave system has been explored for about 4 km, and hikers equipped with a flashlight can access it up to a small lake inside. https://www.lieux-insolites.fr
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Very beautifully laid out and developed. There are also interesting information boards, e.g. about the underground connection of the local springs. At the end of the 19th century, a mill owner wanted to divert the water from the spring, which, after intervention by the population and a member of parliament, led to the first French environmental protection law. https://www.montagnes-du-jura.fr/
2
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Magnificent spot, I recommend!
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Very beautiful waterfall, easily accessible from the car park and then offering several hiking possibilities from its basin. The site is geologically interesting.
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There are over 50 mountain bike trails around Éternoz, offering a wide range of options for different skill levels. The majority, 45 routes, are rated as moderate, with 5 easy and 6 difficult trails also available.
Mountain biking in Éternoz offers a diverse and dramatic landscape. You can expect a mix of forest tracks, technical singletracks, and paths traversing varied terrain, including the wild Lison Valley with its gorges, limestone geology, and dense woodlands. The region is characterized by undulating landscapes, from riverside routes to climbs along valley sides.
Yes, there are 5 mountain bike trails specifically rated as easy around Éternoz, perfect for beginners or those looking for a more relaxed ride. These trails allow you to enjoy the scenic beauty without overly challenging technical sections.
Absolutely. The Éternoz area is rich in stunning hydrological features. Many trails explore the Lison Valley, where you can encounter the powerful Lison Spring and the beautiful Verneau Spring. For example, the Lison Waterfalls – Lison Spring loop from Amondans is a popular route that explores these natural wonders.
Yes, most of the mountain bike routes around Éternoz are designed as loops, allowing you to start and finish at the same point. Examples include the Lison Valley – Lison Waterfalls loop from Refranche and the Lison Waterfalls – Lison Valley loop from Alaise.
Beyond the waterfalls, the region boasts unique karst formations. You might encounter the impressive Sarrazine Cave, a 'wild cathedral' carved into limestone, or the Creux Billard, a karst cauldron with its own waterfall and underground cave system. Keep an eye out for 'Les Chandeliers,' enormous blocks of varied limestone formations along a wooded cornice overlooking the Lison Valley.
Yes, the Jura Mountains around Éternoz offer numerous panoramic viewpoints that reward your climbing efforts. The Belvédère des Feuilles provides stunning views of the Lison Valley's meanders, while the Belvédère du Vieux Château offers extensive vistas. These elevated points are perfect for taking breaks and appreciating the expansive natural scenery.
The area is highly rated by the komoot community, with an average score of 4.2 stars from over 60 reviews. Mountain bikers often praise the diverse terrain, the stunning natural beauty of the Lison Valley, and the rewarding views from various viewpoints.
The trails vary significantly. For instance, a moderate route like the Lison Valley – Lison Waterfalls loop from Refranche is about 13.8 miles (22.2 km) with around 367 meters of elevation gain. Longer, more challenging routes, such as the Lison Valley – Lison Waterfalls loop from Crouzet-Migette, can be up to 35.6 km with over 700 meters of elevation gain.
While specific seasonal details for Éternoz are not provided, the Jura Mountains generally offer good conditions from spring through autumn. Spring brings lush greenery and flowing waterfalls, while autumn showcases vibrant forest colors. Winter conditions can introduce snow and ice, making some trails impassable or requiring specialized equipment.
Yes, you can incorporate historical elements into your ride. For example, Cléron Castle is a notable historical site in the vicinity that could be a point of interest on a longer route.


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